Yes. We are cleaning pro's at the cutting edge ain't we?
This is one thing i got right, very right in fact.
Common sense tells you this can't work in the same way that cleaning windows with water and leaving them wet can't work.
Earn yourself some brownie points with the missus (she won't believe it will work either), and get one. She must have a birthday coming up?
Upstairs? you just put it up there, it will not fall.
It will not hoover the stairs, but that is the only thing.